Test tube sample rack



FIG. 1 is a right-front perspective view of the test tube sample rack;

FIG. 2 is a left-front perspective view thereof;

FIG. 3 is a right-rear perspective view thereof;

FIG. 4 is a left-rear perspective view thereof;

FIG. 5 is a front view thereof;

FIG. 6 is a right view thereof;

FIG. 7 is a rear view thereof;

FIG. 8 is a left view thereof;

FIG. 9 is a top view thereof; and,

FIG. 10 is a bottom view thereof.

The broken line showing in FIGS. 1, 2, 3, 4, 6, 7, 8, 9 and 10 are for illustrative purposes only and form no part of the claimed design. 

The ornamental design for a test tube sample rack, as shown and described. 